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- Add some more descriptive comments to HalpReboot (and rename it from HalReboot) since some of the operations lacked comments.

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- Stall the CPU after each I/O command to simulate I/O delay.
- Flush write buffers before rebooting.
- Refactor sending the reset command since it's not always a matter of using the keyboard port.
- HalReturnToFirmware does a HalpReboot no matter what parameter is sent.

svn path=/trunk/; revision=24741
This commit is contained in:
Alex Ionescu 2006-11-13 04:33:45 +00:00
parent 0e8c70ba22
commit 30c16d9652
1 changed files with 70 additions and 42 deletions
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112
reactos/hal/halx86/generic/reboot.c
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@ -1,70 +1,98 @@
/* $Id$
*
* COPYRIGHT: See COPYING in the top level directory
* PROJECT: ReactOS kernel
/*
* PROJECT: ReactOS HAL
* LICENSE: GPL - See COPYING in the top level directory
* FILE: ntoskrnl/hal/x86/reboot.c
* PURPOSE: Reboot functions.
* PROGRAMMER: Eric Kohl (ekohl@abo.rhein-zeitung.de)
* UPDATE HISTORY:
* Created 11/10/99
* PURPOSE: Reboot functions
* PROGRAMMERS: Alex Ionescu (alex.ionescu@reactos.org)
* Eric Kohl (ekohl@abo.rhein-zeitung.de)
*/
/* INCLUDES ******************************************************************/
#include <hal.h>
#define NDEBUG
#include <debug.h>
/* PRIVATE FUNCTIONS *********************************************************/
static VOID
HalReboot (VOID)
VOID
NTAPI
HalpWriteResetCommand(VOID)
{
char data;
/* Generate RESET signal via keyboard controller */
WRITE_PORT_UCHAR((PUCHAR)0x64, 0xFE);
};
VOID
NTAPI
HalpReboot(VOID)
{
UCHAR Data;
extern PVOID HalpZeroPageMapping;
/* enable warm reboot */
((PUCHAR)HalpZeroPageMapping)[0x472] = 0x34;
((PUCHAR)HalpZeroPageMapping)[0x473] = 0x12;
/* Enable warm reboot */
((PUSHORT)HalpZeroPageMapping)[0x472] = 0x1234;
/* disable interrupts */
Ki386DisableInterrupts();
/* FIXME: Lock CMOS Access */
/* Disable interrupts */
_disable();
/* disable periodic interrupt (RTC) */
WRITE_PORT_UCHAR((PUCHAR)0x70, 0x0b);
data = READ_PORT_UCHAR((PUCHAR)0x71);
WRITE_PORT_UCHAR((PUCHAR)0x71, (UCHAR)(data & 0xbf));
/* Setup control register B */
WRITE_PORT_UCHAR((PUCHAR)0x70, 0x0B);
KeStallExecutionProcessor(1);
/* */
WRITE_PORT_UCHAR((PUCHAR)0x70, 0x0a);
data = READ_PORT_UCHAR((PUCHAR)0x71);
WRITE_PORT_UCHAR((PUCHAR)0x71, (UCHAR)((data & 0xf0) | 0x06));
/* Read periodic register and clear the interrupt enable */
Data = READ_PORT_UCHAR((PUCHAR)0x71);
WRITE_PORT_UCHAR((PUCHAR)0x71, Data & 0xBF);
KeStallExecutionProcessor(1);
/* */
/* Setup control register A */
WRITE_PORT_UCHAR((PUCHAR)0x70, 0x0A);
KeStallExecutionProcessor(1);
/* Read divider rate and reset it */
Data = READ_PORT_UCHAR((PUCHAR)0x71);
WRITE_PORT_UCHAR((PUCHAR)0x71, (Data & 0xF0) | 0x06);
KeStallExecutionProcessor(1);
/* Reset neutral CMOS address */
WRITE_PORT_UCHAR((PUCHAR)0x70, 0x15);
KeStallExecutionProcessor(1);
/* generate RESET signal via keyboard controller */
WRITE_PORT_UCHAR((PUCHAR)0x64, 0xfe);
/* Flush write buffers and send the reset command */
KeFlushWriteBuffer();
HalpWriteResetCommand();
/* stop the processor */
#if 1
/* Halt the CPU */
Ki386HaltProcessor();
for(;;);
#endif
}
/* PUBLIC FUNCTIONS **********************************************************/
VOID STDCALL
HalReturnToFirmware (
FIRMWARE_REENTRY Action
)
/*
* @implemented
*/
VOID
NTAPI
HalReturnToFirmware(IN FIRMWARE_REENTRY Action)
{
if (Action == HalHaltRoutine)
/* Check the kind of action this is */
switch (Action)
{
DbgPrint ("HalReturnToFirmware called!\n");
DbgBreakPoint ();
}
else if (Action == HalRebootRoutine)
{
HalReboot ();
/* All recognized actions */
case HalHaltRoutine:
case HalRebootRoutine:
/* Call the internal reboot function */
HalpReboot();
/* Anything else */
default:
/* Print message and break */
DbgPrint("HalReturnToFirmware called!\n");
DbgBreakPoint();
}
}